and all materials EU and all raw materials (Union European – French) of all capacities (550 kW – 900 kW) up to pressures (4-6-8) bar where the maintenance of hot water boilers from changing the flame pipe or flame modified pipe with the change of smoke pipes according to industry principles and work Tests on the steam boiler ( One and a half times the operating pressure) and all the installation work is done by specialized engineers and certified technicians to finish the work according to the principles of industry.